Critical Habitat - Center for Biological Diversity
... As described for spikedace above, population estimates for loach minnow have not been developed as a result of the difficulty in detecting the species, the sporadic nature of most surveys, and the difference in surveying techniques that have been applied over time. However, based on the available m ...
... As described for spikedace above, population estimates for loach minnow have not been developed as a result of the difficulty in detecting the species, the sporadic nature of most surveys, and the difference in surveying techniques that have been applied over time. However, based on the available m ...
Opens external link in new window
... This review is a product of the Livestock Environmental Assessment and Performance (LEAP) Partnership. The initial objective of this review was to provide the members LEAP Technical Advisory Group (TAG) on biodiversity with a common ground of knowledge on the main biodiversity indicators and assessm ...
... This review is a product of the Livestock Environmental Assessment and Performance (LEAP) Partnership. The initial objective of this review was to provide the members LEAP Technical Advisory Group (TAG) on biodiversity with a common ground of knowledge on the main biodiversity indicators and assessm ...
The Northern Lapwing (Vanellus vanellus) in Norway: Exploring the
... resulted in a considerable loss of grassland habitats like pastures and meadows, and led to increased habitat fragmentation (Johansson & Blomqvist, 1996). When arable fields expand, important habitat features like ditches, habitat islands and other residual habitats are lost (Johansson & Blomqvist, ...
... resulted in a considerable loss of grassland habitats like pastures and meadows, and led to increased habitat fragmentation (Johansson & Blomqvist, 1996). When arable fields expand, important habitat features like ditches, habitat islands and other residual habitats are lost (Johansson & Blomqvist, ...
the Moose Management Report
... effective and that we learn as much as possible from these actions, so that they can be improved on over time. The challenge for British Columbian wildlife managers is they do not have enough control over the moose management levers. The provincial government is encouraged to use all management leve ...
... effective and that we learn as much as possible from these actions, so that they can be improved on over time. The challenge for British Columbian wildlife managers is they do not have enough control over the moose management levers. The provincial government is encouraged to use all management leve ...
Guidance for Conserving Oregon`s Native Turtles Including
... Section 1: What are BMPS and Why are They Needed? Best Management Practices (BMPs) are methods or techniques that have consistently shown results superior to those achieved by other means. A “best” practice can (and should) evolve as improvements are discovered through research and development and ...
... Section 1: What are BMPS and Why are They Needed? Best Management Practices (BMPs) are methods or techniques that have consistently shown results superior to those achieved by other means. A “best” practice can (and should) evolve as improvements are discovered through research and development and ...
Staff Report on Burrowing Owl Mitigation
... 1. Maintain size and distribution of extant burrowing owl populations (allowing for natural population fluctuations). 2. Increase geographic distribution of burrowing owls into formerly occupied historical range where burrowing owl habitat still exists, or where it can be created or enhanced, and wh ...
... 1. Maintain size and distribution of extant burrowing owl populations (allowing for natural population fluctuations). 2. Increase geographic distribution of burrowing owls into formerly occupied historical range where burrowing owl habitat still exists, or where it can be created or enhanced, and wh ...
Landscape Patterns Environmental Quality Analysis
... The relationships between human patterns on the landscape and resulting environmental quality have been well documented in the disciplines of landscape planning, environmental planning, and landscape architecture. Landscape pattern analysis is based on the premise that there are indispensible patter ...
... The relationships between human patterns on the landscape and resulting environmental quality have been well documented in the disciplines of landscape planning, environmental planning, and landscape architecture. Landscape pattern analysis is based on the premise that there are indispensible patter ...
Horse Mussel Beds
... many metres long. These areas of semi-recessed and recessed beds may in some cases extend over hundreds of hectares, and in many cases may be considered as ‘biogenic reefs’, though they are all referred to here as beds. The JNCC Marine Nature Conservation Review (MNCR) has identified four major biot ...
... many metres long. These areas of semi-recessed and recessed beds may in some cases extend over hundreds of hectares, and in many cases may be considered as ‘biogenic reefs’, though they are all referred to here as beds. The JNCC Marine Nature Conservation Review (MNCR) has identified four major biot ...
Horse mussel beds (UK BAP Priority Habitat description)
... many metres long. These areas of semi-recessed and recessed beds may in some cases extend over hundreds of hectares, and in many cases may be considered as ‘biogenic reefs’, though they are all referred to here as beds. The JNCC Marine Nature Conservation Review (MNCR) has identified four major biot ...
... many metres long. These areas of semi-recessed and recessed beds may in some cases extend over hundreds of hectares, and in many cases may be considered as ‘biogenic reefs’, though they are all referred to here as beds. The JNCC Marine Nature Conservation Review (MNCR) has identified four major biot ...
Ecological flexibility in a disturbed landscape
... resource structure. Anja Special Reserve is a 34 ha rocky-outcrop forest fragment that is highly isolated from other forests containing L. catta. L. catta in this reserve have access to abundant food and water resources year-round due to the introduction of non-native fruit trees and the constructio ...
... resource structure. Anja Special Reserve is a 34 ha rocky-outcrop forest fragment that is highly isolated from other forests containing L. catta. L. catta in this reserve have access to abundant food and water resources year-round due to the introduction of non-native fruit trees and the constructio ...
Urban Wildlife Management Plan
... Since European settlement, the vegetation within the City of Yarra has almost entirely been cleared and the area is now predominantly utilised for industrial or high-density residential purposes. The Yarra River has also been extensively realigned and widened and swamps have been drained and filled ...
... Since European settlement, the vegetation within the City of Yarra has almost entirely been cleared and the area is now predominantly utilised for industrial or high-density residential purposes. The Yarra River has also been extensively realigned and widened and swamps have been drained and filled ...
Mesotrophic Lochs WW1 - Tayside Biodiversity
... lochs, but the single factor which is probably the greatest and most active threat is cultural eutrophication. This may be due to direct nutrient inputs from sewage or because of increased nutrient run-off from land due to agriculture, forestry and amenity use. Catchment land use may be a significan ...
... lochs, but the single factor which is probably the greatest and most active threat is cultural eutrophication. This may be due to direct nutrient inputs from sewage or because of increased nutrient run-off from land due to agriculture, forestry and amenity use. Catchment land use may be a significan ...
6.4 Environmental Niche Analysis - Predicting potential occurrence
... determined by diverse factors operating at different spatial scales, including climate (Case and Taper 2000, Soberon 2007). We assume that a species will be present at a given point where three conditions are met: a) abiotic conditions (such as climate) are favourable, b) biotic conditions (other sp ...
... determined by diverse factors operating at different spatial scales, including climate (Case and Taper 2000, Soberon 2007). We assume that a species will be present at a given point where three conditions are met: a) abiotic conditions (such as climate) are favourable, b) biotic conditions (other sp ...
Final Report Nearshore Eelgrass Inventory
... increase the problems for seagrass distribution and productivity. Activities that cause increased nutrient loads in streams and rivers can result in overgrowth of algae that then die and deplete the oxygen from the bottom of poorly flushed bays. Chemical contaminants, such as fertilizers, pesticide ...
... increase the problems for seagrass distribution and productivity. Activities that cause increased nutrient loads in streams and rivers can result in overgrowth of algae that then die and deplete the oxygen from the bottom of poorly flushed bays. Chemical contaminants, such as fertilizers, pesticide ...
A gentle depilation of the niche: Dicean
... very specifically in terms of the physical conditions, food resources, etc., required by the species. For example, he refers to a song sparrow seeking out "its own 'natural' type of habitat, the streamside thicket— the ecologic niche of its species" (Gnnnell 1928, p. 442). In another spot (p. 437), ...
... very specifically in terms of the physical conditions, food resources, etc., required by the species. For example, he refers to a song sparrow seeking out "its own 'natural' type of habitat, the streamside thicket— the ecologic niche of its species" (Gnnnell 1928, p. 442). In another spot (p. 437), ...
The Economic and Social Aspects of Biodiversity Benefits and Costs
... example of earthworms as a keystone species. Biodiversity is also essential to the pollination on which a wide range of crops, including forage plants, depend. It is also vital to pest control, without which productivity losses would be far greater. Each of these services is threatened to one extent ...
... example of earthworms as a keystone species. Biodiversity is also essential to the pollination on which a wide range of crops, including forage plants, depend. It is also vital to pest control, without which productivity losses would be far greater. Each of these services is threatened to one extent ...
Conservation Assessment for the Northern
... extends along the Pacific coast from northern California to Cook Inlet in Alaska (Alaback 1991). Most of the forest is composed of old-growth conifers dominated by western hemlock (Tsuga heterophylla (Raf.) Sarg.) and Sitka spruce (Picea sitchensis (Borg.) Carr). The region is characterized by a coo ...
... extends along the Pacific coast from northern California to Cook Inlet in Alaska (Alaback 1991). Most of the forest is composed of old-growth conifers dominated by western hemlock (Tsuga heterophylla (Raf.) Sarg.) and Sitka spruce (Picea sitchensis (Borg.) Carr). The region is characterized by a coo ...
Demography and feeding behavior of the kelp crab Taliepus
... predation pressure, and physical disturbance (e.g., habitat-specific environmental factors), resulting in specific costs and benefits for individuals (Amaral et al. 2008). For example, habitats with higher structural complexity offer more shelter and resources, thereby supporting high densities of i ...
... predation pressure, and physical disturbance (e.g., habitat-specific environmental factors), resulting in specific costs and benefits for individuals (Amaral et al. 2008). For example, habitats with higher structural complexity offer more shelter and resources, thereby supporting high densities of i ...
Managing Rangelands to Benefit California Red
... habitat may refer to this document for current recommendations. We recommend that this include a review of each species’ biology (Chapters 2 and 3). On-the-ground managers generally have unique knowledge of their properties and grazing operations and, with a full understanding of the goals, can be t ...
... habitat may refer to this document for current recommendations. We recommend that this include a review of each species’ biology (Chapters 2 and 3). On-the-ground managers generally have unique knowledge of their properties and grazing operations and, with a full understanding of the goals, can be t ...
Unifying sources and sinks in ecology andEarth sciences
... These descriptive flow-based concepts no longer suffice to capture the subtleties of the process-based demographic approach that population biology has largely taken in recent years following Pulliam (1988). The emphasis in this approach has been on the causes and consequences of the net spatial flo ...
... These descriptive flow-based concepts no longer suffice to capture the subtleties of the process-based demographic approach that population biology has largely taken in recent years following Pulliam (1988). The emphasis in this approach has been on the causes and consequences of the net spatial flo ...
programmatic biological assessment, conference report, and
... transportation corridors of eastern Colorado over the next 20 years are likely to affect any of the threatened and endangered, proposed, candidate or sensitive species listed below, and to describe conservation measures that CDOT will take to mitigate those impacts. CDOT has three goals: 1) proactiv ...
... transportation corridors of eastern Colorado over the next 20 years are likely to affect any of the threatened and endangered, proposed, candidate or sensitive species listed below, and to describe conservation measures that CDOT will take to mitigate those impacts. CDOT has three goals: 1) proactiv ...
Skeena River Estuary Juvenile Salmon Habitat
... Table 2. Life history of Chinook salmon in the Skeena River watershed (Williams 1989; Gottesfeld and Rabnett 2008). ........................................................................................................... 26 Table 3. Life history of pink salmon in the Skeena River watershed (Wil ...
... Table 2. Life history of Chinook salmon in the Skeena River watershed (Williams 1989; Gottesfeld and Rabnett 2008). ........................................................................................................... 26 Table 3. Life history of pink salmon in the Skeena River watershed (Wil ...
Action Plan - Environment and Natural Resources
... management challenge involves the impacts of oil and gas development, along with other land use activities such as forestry, tourism and mining, and all of their interactions (or cumulative effects of all the impacts). Endangered species – A species facing imminent extirpation or extinction. Extinct ...
... management challenge involves the impacts of oil and gas development, along with other land use activities such as forestry, tourism and mining, and all of their interactions (or cumulative effects of all the impacts). Endangered species – A species facing imminent extirpation or extinction. Extinct ...
Distribution and Movements of Woodland Caribou on Disturbed
... across the study area during both seasons at the home range and harvest area scales. . 72 Table 2. Independent variables used to derive RSF models for woodland caribou found across the study area during the snow-covered season at the movement path scale. .... 73 Table 3. Independent variables used t ...
... across the study area during both seasons at the home range and harvest area scales. . 72 Table 2. Independent variables used to derive RSF models for woodland caribou found across the study area during the snow-covered season at the movement path scale. .... 73 Table 3. Independent variables used t ...
Habitat destruction
Habitat destruction is the process in which natural habitat is rendered functionally unable to support the species present. In this process, the organisms that previously used the site are displaced or destroyed, reducing biodiversity. Habitat destruction by human activity is mainly for the purpose of harvesting natural resources for industry production and urbanization. Clearing habitats for agriculture is the principal cause of habitat destruction. Other important causes of habitat destruction include mining, logging, trawling and urban sprawl. Habitat destruction is currently ranked as the primary cause of species extinction worldwide. It is a process of natural environmental change that may be caused by habitat fragmentation, geological processes, climate change or by human activities such as the introduction of invasive species, ecosystem nutrient depletion, and other human activities mentioned below.The terms habitat loss and habitat reduction are also used in a wider sense, including loss of habitat from other factors, such as water and noise pollution.